Service Manual
Table Of Contents
SiUS281811E
Part 6 Service Diagnosis 163
1. Servicing Items to be Confirmed .............................................................166
1.1 Troubleshooting........................................................................................ 166
1.2 Precautions for Maintenance.................................................................... 166
1.3 Refrigerant Properties (R-410A)............................................................... 168
2. Symptom-based Troubleshooting ...........................................................169
2.1 Indoor Unit Overall ................................................................................... 169
2.2 With Optional Infrared Presence/Floor Sensor......................................... 172
3. Troubleshooting with Remote Controller.................................................174
3.1 Wired Remote Controller.......................................................................... 174
3.2 Wireless Remote Controller ..................................................................... 175
4. Troubleshooting by Error Codes .............................................................177
4.1 Error Codes and Description .................................................................... 177
4.2 Error Codes - Sub Codes ......................................................................... 179
4.3 Error Code Indication by Outdoor Unit PCB............................................. 181
4.4 External Protection Device Abnormality (Except FTQ-TA)....................... 185
4.5 External Protection Device Abnormality (FTQ-TA Only) .......................... 186
4.6 Indoor Unit PCB Abnormality ................................................................... 187
4.7 Drain Level Control System (S1L) Abnormality........................................ 188
4.8 Indoor Fan Motor (M1F) Lock, Overload .................................................. 190
4.9 Indoor Fan Motor Abnormality.................................................................. 192
4.10 Blower Motor Not Running ....................................................................... 196
4.11 Indoor Fan Motor Status Abnormality....................................................... 197
4.12 Low Indoor Airflow.................................................................................... 198
4.13 Swing Flap Motor Abnormality ................................................................. 199
4.14 Power Supply Voltage Abnormality.......................................................... 201
4.15 Blower Motor Stops for Over/Under Voltage ............................................ 202
4.16 Electronic Expansion Valve Coil Abnormality, Dust Clogging .................. 203
4.17 Drain Level Above Limit ........................................................................... 205
4.18 Capacity Determination Device Abnormality ............................................ 206
4.19 Transmission Abnormality (between Indoor Unit PCB and Fan PCB) ..... 207
4.20 Blower Motor Communication Error ......................................................... 209
4.21 Thermistor Abnormality ............................................................................ 210
4.22 Combination Abnormality (between Indoor Unit PCB and Fan PCB)....... 211
4.23 Blower Motor HP Mismatch...................................................................... 212
4.24 Indoor Blower Does Not Have Required Parameters to Function............ 213
4.25 Remote Sensor Abnormality .................................................................... 214
4.26 Infrared Presence/Floor Sensor Error ...................................................... 215
4.27 Remote Controller Thermistor Abnormality .............................................. 220
4.28 Outdoor Main PCB Abnormality ............................................................... 221
Part 6
Service Diagnosis